Dragonwolf (2013)

The Devil's Cauldron, a city where depravity and violence has forged a society in which only the lethal and callous can survive, two young men who possess the intellect and ferocity to flourish, carve a name for themselves as the most efficient and unstoppable hit men. Side by side, these two brothers are the deadliest killers, feared by even the most evil criminals. But when a woman of rare beaut